gemstone
Tumbled Amethyst
Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, purple color, vitreous luster, trigonal crystal system, and conchoidal fracture with no true cleavage.
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Physical properties
Hardness of 7 on the Mohs scale, purple color, vitreous luster, trigonal crystal system, and conchoidal fracture with no true cleavage.
Formation & geological history
Formed in hydrothermal veins and gas cavities within volcanic rocks as silica-rich solutions cool and crystallize over millions of years.
Uses & applications
Widely used in jewelry, ornamental carvings, and as a popular collectible or metaphysical healing stone.
Geological facts
The purple color is caused by irradiation and trace amounts of iron substituting for silicon within the quartz lattice.
Field identification & locations
Easily identified by its distinctive purple hue, high hardness scratching glass, and lack of cleavage; found globally with major deposits in Brazil and Uruguay.
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